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(→Composition of the total moment: Moment coefficient versus absolute moment) |
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All the points described here can be tested and verified using the FlightGear hang glider ''Laminar 13 MRX''. This should improve the understanding and might help to avoid extrem flight situations or to train safe recoveries from such situations. | All the points described here can be tested and verified using the FlightGear hang glider ''Laminar 13 MRX''. This should improve the understanding and might help to avoid extrem flight situations or to train safe recoveries from such situations. | ||
'''This section is still under construction.''' The current status is | '''This section is still under construction.''' The current status is July 11, 2025. | ||
As an introduction, reference is made to two threads in the German Hang Gliding Forum, in which the static and dynamic longitudinal stability of weight-shift controlled hang gliders is examined in more detail: | As an introduction, reference is made to two threads in the German Hang Gliding Forum, in which the static and dynamic longitudinal stability of weight-shift controlled hang gliders is examined in more detail: | ||
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The moment coefficient is closely related to the lift coefficient and is often used to assess flight behavior. In particular, the moment coefficient describes how strongly an aircraft responds to a change in the angle of attack.<br> | The moment coefficient is closely related to the lift coefficient and is often used to assess flight behavior. In particular, the moment coefficient describes how strongly an aircraft responds to a change in the angle of attack.<br> | ||
The moment coefficient is dimensionless. This makes it easier to compare the stability and behavior of different aircraft, regardless of their size or weight. The absolute moment, on the other hand, depends on specific units, which makes comparisons more difficult. | The moment coefficient is dimensionless. This makes it easier to compare the stability and behavior of different aircraft, regardless of their size or weight. The absolute moment, on the other hand, depends on specific units, which makes comparisons more difficult. The moment coefficient can be used under various flight conditions (such as speed and air density) to characterize an aircraft's behavior. Since it is defined relative to other quantities (lift, speed), it remains consistent even when conditions change.<br> | ||
The moment coefficient can be used under various flight conditions (such as speed and air density) to characterize an aircraft's behavior. Since it is defined relative to other quantities (lift, speed), it remains consistent even when conditions change.<br> | |||
The moment coefficient is defined as follows:<br> | The moment coefficient is defined as follows:<br> | ||
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